RFID based system for monitoring the corrosion of reinforcement in concrete

Abstract

The present invention provides an RFID based system for monitoring the corrosion of reinforcement in concrete. The system includes an embedded sensor and an external circuit. The embedded sensor is an LC oscillation circuit based on reinforcement equivalent, and the external circuit is divided into an external detection circuit and a wireless transceiver circuit. The external detection circuit has the main functions of providing a sweep frequency excitation source for the LC oscillation circuit and collecting signals reflecting reinforcement corrosion from the embedded sensor; and the wireless transceiver circuit is responsible for maintaining communication between nodes as well as between the nodes and sink nodes. The on-off situation of steel wires in different thicknesses can reflect the different degrees of corrosion of reinforcement in concrete structure. The system is wireless and passive, can achieve long-term monitoring; and compared with the traditional corrosion monitoring, the method can reflect different degrees of reinforcement corrosion in concrete.

Description

technical field [0001] The invention relates to a steel bar corrosion monitoring system in concrete, in particular to an RFID-based steel bar corrosion monitoring system in concrete. Background technique [0002] The reasons for the durability degradation of reinforced concrete structures are mainly the corrosion of concrete materials and the corrosion of steel bars. Among them, the corrosion of steel bars is the most important factor affecting the durability and service life of reinforced concrete structures. The corrosion of steel bars will lead to a decrease in the bearing capacity and ductility of reinforced concrete members, thereby affecting the safety and durability of the entire structure, and severe corrosion may even lead to structural damage. [0003] Corrosion of steel bars in concrete is an electrochemical process, and electrochemical measurement is a powerful means to reflect its essential process. At present, the most commonly used electrochemical detection me...

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Problems solved by technology

The corrosion of steel bars will lead to a decrease in the bearing capacity and ductility of reinforced concrete members, thereby affecting the safety and durability of the entire structure, and severe corrosion may even lead to structural damage

[0003] Corrosion of steel bars in concrete is an electrochemical process, and electrochemical measurement is a powerful means to reflect its essential process. At present, the most commonly used electrochemical detection method is the half-cell potential method, but the half-cell potential method can only qualitatively judge the corrosion of steel bars. Corrosion probability, and long-term monitoring is not possible

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